Braised Lamb with Rosemary and Garlic

Name: Braised Lamb with Rosemary and Garlic
Ingredients: 2 teaspoons coriander seeds; 4 garlic cloves, smashed; ½ cup coarsely chopped rosemary; 2 teaspoons dried oregano; 2 teaspoons freshly ground black pepper; ¾ cup olive oil, divided; 1 6-pound boneless leg of lamb, butterflied; Kosher salt; 1 medium onion, coarsely chopped; 1 medium fennel bulb, coarsely chopped; 1 medium carrot, peeled, coarsely chopped; 1 head of garlic, halved crosswise; 2 dried chiles de árbol or ½ teaspoon crushed red pepper flakes; ¾ cup red wine; Flaky sea salt; Salsa Verde with Toasted Breadcrumbs and Roasted Red Pepper Harissa (for serving); A spice mill or a mortar and pestle